Insulation-type fire-proof door for subway tunnel

Abstract

The invention discloses an insulation-type fire-proof door for a subway tunnel. The door comprises a metal door frame, fire-proof door leaves, rotary shafts and tension springs. The outer frame of themetal door frame is inlaid with a flexible graphite sealing strip. Two fire-proof door leaves are jogged in the manner of being mutually concave and convex. The rotary shafts are fixed at the connected positions of centers of the metal door frame and the fire-proof door leaves. One ends of the tension springs are fixed at 1 / 4 parts of the width of the metal door frame. The other ends thereof arefixed at 3 / 5 parts of the width of the fire-proof door leaves. Each fire-proof door leaves comprise two-side fire-proof panels and a middle-layer heat-preserving board. Fire-proof panels are impregnated by 30-45% of inflaming-retarding liquid. Additionally, the outer surfaces of the fire-proof panels are coated with fire-proof housings. Heat-preserving boards are internally equipped with 10 to 15groups of thermal-insulation structures with trapezoid cross sections. The fire-proof housings are composed of silicone rubber, silicon dioxide aerogel powder, aluminizing polyimide, zinc stannate andchloroplatinic acid. The thermal-insulation structures are filled with thermal-insulation material. The average diameter of an internal hole gap of the thermal-insulation material ranges from 40 to 50 nm. The insulation-type fire-proof door for the subway tunnel has excellent fire-proof performance, heat-insulation performance and sound insulation performance and can prevent fire disasters from further spreading within the long period of time.

Description

technical field [0001] The invention relates to a fire door, in particular to an isolated type fire door for a subway tunnel. Background technique [0002] Fire doors are generally made of steel, non-combustible wood or inorganic non-combustible materials, which can inhibit the spread of fire and smoke diffusion within a certain period of time. The passenger capacity of the subway can reach 3,000 people. Once a fire breaks out, it will take a lot of time to evacuate passengers. Therefore, compared with ordinary fire doors, the fire doors of subway tunnels require a longer and higher tolerance to fire , which requires higher fire resistance and heat insulation. The patent application number is CN201310602506.5, which discloses a subway tunnel decompression type fire door. The patent moves back and forth under the action of the piston wind through the translational door to promote the high-pressure airflow into the low-pressure side, achieving the effect of slow release and d...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a subway tunnel isolation type fire door to solve the problem of poor fireproof and heat insulation performance of the hollow board proposed in the above background technology

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